Developments in coffee biotechnology—in vitro plant propagation and crop improvement

Kumar, Vinod; Naidu, M. Madhava; Ravishankar, G. A.

doi:10.1007/s11240-006-9134-y

Cited by 49 publications

(37 citation statements)

References 61 publications

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“…The authors subsumed Psilanthus genus under the Coffea as firstly established by Chevalier (1947), increasing the number of species from 104 to 124. The genus Coffea is composed by perennial trees or shrubs which may grow in regions from tropical evergreen forests to drier environments such as savannahs, showing different caffeine content ranging from a high one in some C. arabica and C. canephora varieties to a very low or null caffeine content in others as in C. salvatrix and C. pseudozanguebariae, for instance (Kumar et al, 2006;Santa Ram et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

A Karyological Study in Some Species of Coffea L. and in the Closest Relative Psilanthus travancorensis (Wight & Arn.) J.-F. Leroy

Pierozzi

Borghi

Silvarolla

2012

Not Bot Hort Agrobot Cluj

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Chromosome characterization were carried out in Coffea kapakata A. Chev (Bridson), C. racemosa Lour., C. salvatrix Swynn. & Philipson and in Psilanthus travancorensis (Wight & Arn.) J.-F. Leroy (2n=22) by employing the conventional acetic orcein technique as well as by C-and NOR-banding aiming further comparative studies. Although C. canephora and C. dewevrei have already been studied and depict a C-band karyotype, they have also been included for further comparisons, since NOR-banding and some other morphometric data have not been obtained yet. However, there were observed some differences among the species regarding chromosomal morphometry. The karyotype formula obtained was 3m+6sm+2sm s for C. salvatrix and P. travancorensis, 1M +2m + 6sm + 2sm s for C. kapakata and 2M +1m + 6sm + 2sm s for C. racemosa. All species displayed a moderate karyotype asymmetry and according to Stebbins system, C. canephora, C. dewevrei, C. kapakata and C. racemosa were classified as 3B while C. salvatrix and P. travancorensis were classified as 2A. Among the four indices used to assess karyotype asymmetry, Paszko AI index along with Stebbins were best suited to individualize the species. C-bands were preferentially situated at a pericentromeric/centromeric position. Two pairs of chromosomes, with secondary constriction and satellite segments, were observed in all the species following acetic orcein staining. C. racemosa and C. salvatrix showed NOR-band in both pairs, while only one chromosome pair carrying NOR-band was seen in C. canephora, C. dewevrei, C. kapakata and P. travancorensis. Data on chromosome morphometry, asymmetry indices and NOR-banding were suitable for the characterization of the species.

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Section: Introductionmentioning

confidence: 99%

A Karyological Study in Some Species of Coffea L. and in the Closest Relative Psilanthus travancorensis (Wight & Arn.) J.-F. Leroy

Pierozzi

Borghi

Silvarolla

2012

Not Bot Hort Agrobot Cluj

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“…According to Kumar, Naidu and Ravishankar (2006), the known effects of silver nitrate on somatic embryogenesis support the hypothesis that this product promotes direct somatic embryogenesis and callus formation in indirect somatic embryogenesis, which can be attributed to ethylene regulation during the specific embryogenesis stages of Coffea. According to Feria, Jimenez and Barbon (2003), (HATANAKA et al, 1995).…”

Section: Resultsmentioning

confidence: 94%

Callus induction and embryo regeneration in Coffea arabica L. anthers by silver nitrate and ethylene

Silva¹,

Luz²,

Rodrigues³

et al. 2011

Rev. Ciênc. Agron.

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-The genetic breeding of coffee by conventional methods to obtain new cultivars is time-consuming. Anther culture can yield homozygous lines quickly from bi-haploids. This study used anther cultures of Coffea arabica L. cv. Catuaí Vermelho 99, and tested the effect of silver nitrate (AgNO 3 ) and ethylene in callus-formation induction and bihaploid seedling regeneration. The anthers were inoculated in MS to which 2 mg L -1 2,4-D had been added with AgNO 3 (5 mg L -1 ) together with ethylene being introduced or not, for different periods (the control, 2, 4, 6, and 8 days). At the end of 12 days, the anthers were transferred to the regeneration medium, to which 0.108 mg L -1 kinetin had been added. Greater oxidation and intumescence were observed in the first days after exposure to ethylene; the cultivar Catuaí Vermelho 99 responded to callus formation and also direct embryogenesis in the presence of ethylene.

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“…Vegetative propagation of coffee by stem cuttings guarantees uniformity as it maintains the genetic make-up of the planting materials while propagation by seeds leads to genetic variability due to segregation of genes during fertilization (Kumar et al, 2006). An ideal propagation medium for successful rooting must be friable, sterile, have pH of 5.5 to 6.5 and well drained to ensure availability of oxygen and nutrients for seed germination, root initiation and seedling growth (Holloway, 2008;Gopale and Zunjarrao, 2011;Yeboah et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Effects of growth media on rooting of stem cuttings of hybrid coffee varieties

Magesa¹,

Msogoya²,

Rweyemamu³

2018

Afr. J. Agric. Res.

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The objective of this study was to evaluate the effect of different growth media on rooting of stem cuttings of hybrid coffee varieties. The experiment was conducted on-station under a shade house at Tanzania Coffee Research Institute (TaCRI) from October 2013 to February 2014 using a split plot experiment in a Randomized Complete Block Design (RCBD) with four replications. The main factor consisted of five hybrid coffee varieties (KP423-1, KP423-2, N39-3, N39-2 and N39-7) and the sub-factor consisted of five types of rooting media (red soil, peat moss, decomposed saw dust, rice husk and forest soil + fine sand 2:1 (v/v) as a control). The stem cuttings were planted in each type of the media and four months after planting, the cuttings were evaluated based on number of rooted cuttings, total number of roots per cutting, number of lateral roots per cutting and root length. The data were subjected to analysis of variance using CoStat software and treatment means were separated based on Tukey's test at P ≤ 0.05. Results indicate that coffee varieties N39-2 and N39-3 produced the highest rooted stem cuttings of 64.2 and 63.9% respectively. Results also show that red soil media provided the highest rooted stem cuttings of 77.9% followed by sawdust with 68.0%. It is recommended that propagators should use red soil as a rooting media for improving rooting percentage of stem cuttings from improved coffee varieties. Further studies are required to improve chemical and physical properties of red soil media.

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Developments in coffee biotechnology—in vitro plant propagation and crop improvement

Cited by 49 publications

References 61 publications

A Karyological Study in Some Species of Coffea L. and in the Closest Relative Psilanthus travancorensis (Wight & Arn.) J.-F. Leroy

A Karyological Study in Some Species of Coffea L. and in the Closest Relative Psilanthus travancorensis (Wight & Arn.) J.-F. Leroy

Callus induction and embryo regeneration in Coffea arabica L. anthers by silver nitrate and ethylene

Effects of growth media on rooting of stem cuttings of hybrid coffee varieties

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